Flux saturation number of superconducting rings

Details Flux saturation number of superconducting rings Flux saturation number of superconducting rings

2007-09-07

arxiv.org/abs/0709.1086v3

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

The distributions of electrical current and magnetic field in a thin-film superconductor ring is calculated by solving the London equation. The maximum amount of flux trapped by the hole, the fluxoid saturation number, is obtained by limiting the current density by the depairing current. The results are compare it with similar results derived for the bulk case of a long hollow cylinder [Nordborg & Vinokur, Phys. Rev. B 62, 12408 (2000)]. In the limit of small holes our result reduces to the Pearl solution for an isolated vortex in a thin film. For large hole radius, the ratio between saturation numbers in bulk and film superconductors is proportional to the square root of the hole size.

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